|Springs like this are one in Florida are one type of karst|
landscape feature. Springs across Florida have seen an
increase in pollution--particularly nitrate.
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Karst landscapes, or the landscapes of limestone terrains, are among the most fragile on the planet. They have few rivers or streams and most of the drainage is to the subsurface. They are places with caves, sinkholes, springs, and other unique features. They are prone to fast pollution problems, instability of the surface, and drought.
This issue came about from a special session we organized at the annual meeting of the Geological Society of America a few years ago on the topic.